Locomotive bell ringer



2 Sheets-Sheet l Filed Jan. 17, 1930 .ma hd u mw. Nm QQ @.NAMMWH.

Nov. l1, 1930. G. WALTER -LoCoMoTvE BELL RINGER 2 Sheets-Sheet 2 Filed Jan. 17, 1933 NN NN uw NQN n@ NN Patented Nov. 1l, 1930 Y y l.; l i. c i

' Y UNITED STATES 'PATENT' -OFFICE i y GUs'rAvE wALTnR, oF JERSEYcrrxz.NiiviJERSEY` i y i .Y d Locoivio'rrvn BELL Innerenk i n Y A'pyvglcationl Yfiled January 17, v1930.` Serial 1V\1o."f121,56157.k

`The vpresent invention relates to improveoperate with a reciprocating valve 13 carried ments in locomotive bell ringers, and hasfor on a valve stem lwhich isiitted to slide an 'obj ect to provide a simply constructed and snugly within the part of the passage 11 hava simply operating locomotive bell ringer of Y ing the smaller'diameter. it' Y 5 afcompact construction adapted to be'actu- The stem 14 is of such length that it will s 55 ated by air under pressure or other elastic project from the passage 11 and'at its pro- Aiuidfv 1 'y v Y' jecting end it is preferably provided, with a j Another object'of the invention is to prorounded nose for a purpose later explained. A'vide an improvedflocomotive bell ringer that VAt an intermediate point, the stem 14 is pro- *310' 'willrinsurethe operation of the belland Will vided witlia reduced part 15. for formingan v60 avoid thehammering of the plunger within annular channelabout such reduced part and the cylinder of the bell ringer. n n K I within the passage 11, whereby-the com- With the foregoing and other objects in pressed air or other elastic -fluid,which is view, the invention` willbe morel'fully Vdelreceived/through the inlet A15:trom an ap- :'15fscribed hereinafter, and will be moreparpropriate sourceinto the larger portionof- 65' f tic'ularlypointed out inthe claims appended the passage 11 may How past the va'lvei'13l Yhereto. 'i Y j Y v V'and through the inlet port17 yinto theV in- 71'1'1 the drawings, wherein like symbols 1re` terior spaceofthecylinder 5y at one side of I vfer to lilreor corresponding` parts throughoutk the plungerv 6. The valve 13 is normallyand Il'l20`theseveral views, f Y yfyieldably held to its seat by the action of a 70 Figure 1 is a longitudinal sectional view coil spring`18; The valve and itsvalve stem taken 'through 'an improved bell ringer conandthe `coilsp'ring are insertedthrough. the Astructed in accordance with the present inlarger endjof the passage 11, after which the vention. v f n "f valve assembly' andnspring is held inplace A Y; 25 `Figure`2 is a similar view with'parts broken by-a threadedvplug 19, which is alsov useful 75 away and showing the device in a subsequent in adjusting the tension ofthe spring 18;v i position, and Y n l Thecylinder adjacent but in spaced relaf Figure 3fisj also alongitudlnal fragmentary tionfrom its closed end Yis provided with an vsectional view1 withthe parts in a third posiair .I outlet indicated at 20. The V,cylinder 5 30tion1of'operation. -V V carries at one sidea guide-way 21 for a valve 80 Referring more particularly to the'draw, rodw22, which is mounted to reciprocate in iings 5 designates the cylinder or barrel of the guide and through a stuiiing rbox 23 `the motor and l6 `represents the' plunger 0r mounted in fone end of the'guide-way 21l piston mounted to reciprocate within the j The cylinder 5 near the inlet end andthe 35 cylinder 5, the lunger ('being coupled to guide-way 21 are provided withfregistering ,the plunger rod i) which extends through oneV exhaust ports 24.v The valve frod 221carries head of the cylinder and is adaptedl to be a reduced free end 25 and a beveled-nose 26 coupled tothe Abell as hereinafter explained. for encounteringth'e projecting rounded end The other'end of the cylinder 5 is-open of the valve stem 14. e n

'- 40 "and therel is lfitted y,to such open end avalve Spacedadjusting nuts 27 and 28are mount- 90 Y vcasing Shavinga flange 9y for` fitting Within ed on the screw threaded end ofthe valve rod the cylinder'. This casing' 8 is secured tothe 22 'and' are held in adjusted position'by the cylinder as bythe use of bolts or other-fastencompanion` lock nuts 29 and 80. The eye Ving means 10. ,The casing S is traversed by 29 of a boltSO is adapted toloosely i'it over iHv"15 a transverse passage 11, which runs from end the threaded vportion of the 'valve 'rod 22 and 95 to end of the `casing 8 and cross'wise of the to slide back` andlforth between the adjustcylinder 5. QThis'passa'ge 11 is constructed of ing nuts 27 and 28., The bolt 30 is carried by differential diameters' with a valve seat *12, the plunger, rod 7 which carries at its ,outer l`between the portions of greater and less'diend the piston Vcap 31 and a socket 32 for v '50 ameter. This valve seat 12 is'adapted to cothe universal ball 33 attached'to the ycon- 1 necting rod 34. The connecting rod 34 is screw Vthreaded at its other end to engage in the threaded socket 35 on the movable member 36 of the cross head 37. Bolts 38 extend through both the cross head 37 and its movable member 36, the heads 39 of the bolt being disposed against the member 36. The nuts `40 of the bolts are spaced fromA the cross head 37 and between the nuts 40 and the cross head 37 are wound coil springs 41. The nuts 40 are useful in adjusting the tensionof thev coil springs 41.

The crank's shown at 42 as having" set screws 43 for securing thereintheshaft 44 of thebell. lThis crank 42 carries a pin 45 for extending through the cross head 37 to which it .is affixed as by a cotter .pin 46 or` other appropriate device.

\ ofthe valve rod 22 and will-finally strike Inthe use of the-invention theparts are initially, asshown in Figure`2, with tlie bell at a state of rest. The valve 13 is shown to be heldlopen by the valverod 22 engaging the stem '14. When the operator turns on the compressed air, such air will fiow past they valve 13 into the inlet 17 causing Ythe piston or plunger 6 to move toward the right. During this movement the eye 29 ofthe bolt 3() will slide over the threaded portion the adjusting nut 28 and shift the valve-rod 22 out of engagement with the valve stemA 14,

thus permitting the coil springf18 to `-close the valve 13 against Yits seat' 12 and cut ofll thev further intake of the compressedfair. Howa ever, the nuts 27 and 28 areso spaced on a valve rod 22 that this closing of the valvewill not take place until the plunger 6 has traversedy the major length ofthe cylinder 5. `Even after the closing of the valve, the compressed air'in the cylinder will continue to move the plunger 6 toward the right and this action willltalre place up until `thevalve rod 22 is moved so that its reduced part 251s brought opposite the exhaust po1'ts'24, whereupon the compressed air will be evacuated-to theatmosphere. A

4The momentum: acquired by the' bell will carry the plunger 6 still `further to the right until and after the air outlet 20 is masked by theplunger 6. This Aair outlet 2O permits 'thecylinder to breathe freely at the right side of the plunger 6 so` as not to permit of the formation of any partial vacuum which would interfere with the freemovement back and forth of the plunger 6. -`However, to-

` ward the end of theV right stroke of the pis- Yton 6, this airvent 20 will be closed vby the,

plunger 6 moving over same and thereafter ,the further movement of the piston 6 toward the right will be cushioned by the entrapped air in the closedend of the cylinder 5. This` fwill bring the bell to a cushioned stop and will prevent the plunger 6 from hammering against the closed head of the cylinder 5.

' Y *Whenthe bellswings back Vit will carryv the plunger 6 with it and during the course of the return movement to the left, the eye 29 of the bolt 30 will encounter the opposite adjusting nut 27, thereby pushing the valve rod 22 back in the opposite direction or to the left, irst closing the exhaust ports 24 rand later reopening the valve 13. .In this lway the cycle of operation is repeated, the

bell having been carried over the dead cenn ter by the force and momentum of its swing.

-Sh'ould the momentum of the bell happen to move thepiston to the end of the stroke, heavy knock of piston against cylinder wall is further :avoided `by means of the springs 41 of the cross head 37. These springs will take up' the vmomentum which is left` in the bellby compression ofthe springs and by separation of the cross head members 36 and 37. i

' It is obvious that various changesand modifications may-be made in the details of construction and design of the above speciyicallydescribed `embodiment of thisv invention without departing from the spirit thereof, such changes and modifications being rey stricted only claims. Y ,What is claimed is :-V

1. An improved locomotive bell ringer comprising a cylinder having inlet and exby the scope of the following haust ports at one end portion and van air outletV at the other endV portion, a plunger connected tothe bell and fitted to. reciprocate in said cylinder, a `normally closed valve for controlling saidinlet, `and avalve rod movable with said piston and having a Vreduced part for controlling the opening and closing'of the exhaust port and further having an end portion for acting to open said valve only `after theexhaust port is closed.`

2. An improved locomotive bell i ringer comprising a cylinder having'V inlet and exhaust ports at one end portion and an air outlet at the other end portion, a plunger coupled to the bell and mounted tol reciprocate in said cylinder, a normally closedvalve for controlling the inlet, a stem for said valve, a valve rod mounted to move with and exhaust ports at one end portion thereof and an air outlet at the opposite end portion, a. plunger coupled to the bell and tted to reciprocate in said cylinder, a normally;-

closed `valve for controlling the inlet port, a valve rod having a portion for opening the valve and a second portion acting to open and close the exhaust port,` and means between said plunger and valverod for` mov-if ing the valve rod upon the end portions of the valve and a second portion acting to open means for shifting the valve rod with the and close the exhaust port, means movable lwith said plunger and freely along said valve rod, and adjustable members on said valve rod disposed to be encountered by said plunger.

In testimony whereof I aiixrmy signature.

GUSTAVE WALTER. 

